B2559
DTC B2559
CIRCUIT DESCRIPTION
The body control module (BCM) receives an ground from the courtesy lamp ground circuit. The sole purpose of this input is to provide a ground path for all of the courtesy lamps controlled through the courtesy lamp low control circuit.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B2559 Passenger Compartment Lamp Control Circuit Open
CONDITIONS FOR RUNNING THE DTC
If the input does not match a normal ground potential.
CONDITIONS FOR SETTING THE DTC
- The BCM detects a open when a ground is expected.
- The condition above must be present for more than 0.3 seconds
ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2559 in memory.
CONDITIONS FOR CLEARING THE DTC
- A current DTC B2559 will clear if the open is no longer detected by the BCM.
- A history DTC B2559 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present nor any other malfunction in the BCM is detected.
- The BCM receives a clear code command from the scan tool.
DIAGNOSTIC AIDS
- If the DTC B2559 is a history DTC, the fault may be intermittent.
- The following conditions may cause an intermittent malfunction to occur:
- An intermittent open in the theater dimming ground circuit.
- The BCM is intermittently opened.
TEST
